Edgar Award Nominee for Best First NovelNamed a New York Times Best Thriller of 2021""I devoured this riveting book through a day of travel...My desire to rush to the end clashed with my desire to savor every word. Who would be the last psychopath standing? New York Times Book Review""Fresh, fast-paced and fiendishly clever! If you love watching true crime and wonder about the psychopaths among us, this is the book for you!"" Lisa Gardner, #1 New York Times bestselling authorYou should never trust a psychopath. But what if you had no choice?It would be easy to underestimate Chloe Sevre She's a freshman honor student, a legging-wearing hot girl next door, who also happens to be a psychopath. She spends her time on yogalates, frat parties and plotting to kill Will Bachman, a childhood friend who grievously wronged her. Chloe is one of seven students at her Dc-based college who are part of an unusual clinical study of psychopaths students like herself who lack empathy and can't comprehend emotions like fear or guilt. The study, led by a renowned psychologist, requires them to wear smart watches that track their moods and movements.When one of the students in the study is found murdered in the psychology building, a dangerous game of cat and mouse begins, and Chloe goes from hunter to prey.